# US 9,752,578 B2 · Scroll compressor and method for assembling a scroll compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,752,578 B2 - Document ID: US9752578B2 - Status: Granted - Kind: B2 - Application number: 14/693,946 - Filed: 2015-04-23 - Published: 2015-11-05 - Granted: 2017-09-05 - Earliest claimed: 2014-05-02 - Assignees: LG Electronics Inc. - Applicants: LG Electronics Inc. - Inventors: Nara Han; Kiuk Lee; Kiwon Park - Web page: https://patentgrep.com/patent/US9752578B2 ## CPC - F04C 18/0223: {with symmetrical double wraps} - F04C 18/0215: {where only one member is moving} - F04C 23/008: {Hermetic pumps} - F04C 29/005: {Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions} - F04C 2240/52: for assemblies with supports on both sides - Y10T 29/49242: Screw or gear type, e.g., Moineau type - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A scroll compressor and a method for assembling a scroll compressor are provided. The scroll compressor may include a casing including a rotational shaft, a main frame coupled to an inside of the casing, a first scroll that revolves due to rotation of the rotational shaft, the first scroll being supported by the main frame, and a second scroll disposed on or at a side of the first scroll to define a plurality of compression chambers together with the first scroll. The second scroll may include a head plate including a wrap, and at least one coupling guide that extends from the head plate. The at least one coupling guide may include a first reference pin coupling hole, into which a reference pin may be inserted, and a guide hole, into which a coupling member may be inserted. ## Claims ### Claim 1 A scroll compressor, comprising: a casing including a rotational shaft; a main frame coupled to an inside of the casing; an orbiting scroll revolved by rotation of the rotational shaft, the orbiting scroll being supported by the main frame; and a fixed scroll provided on or at a side of the orbiting scroll to define a plurality of compression chambers together with the orbiting scroll, wherein the fixed scroll includes: a head plate including a wrap and an outer peripheral surface; and at least one scroll protrusion that protrudes outward in a radial direction from the outer peripheral surface of the head plate, wherein the at least one scroll protrusion includes both a first reference pin coupling hole, into which a reference pin is inserted, and a guide hole, into which a screw is inserted, wherein the reference pin is removed from the first reference pin coupling hole after the fixed scroll and the main frame are assembled, wherein the main frame includes a main body and at least one frame protrusion that protrudes outward in a radial direction from an outer peripheral surface of the main body, and wherein the at least one frame protrusion includes a second reference pin coupling hole, into which the reference pin is inserted, and a frame guide hole, into which the screw is inserted. ### Claim 2 (depends on 1) The scroll compressor according to claim 1, wherein the at least one scroll protrusion includes a plurality of scroll protrusions, and wherein the plurality of scroll protrusions is spaced apart from each other. ### Claim 3 (depends on 2) The scroll compressor according to claim 2, wherein the at least one frame protrusion includes a plurality of frame protrusions corresponding to the plurality of scroll protrusions. ### Claim 4 (depends on 3) The scroll compressor according to claim 3, wherein the plurality of scroll protrusions includes: a first scroll protrusion having a first coupling guide hole, into which a first screw is inserted; and a second scroll protrusion having a second coupling guide hole, into which a second screw is inserted. ### Claim 5 (depends on 4) The scroll compressor according to claim 4, wherein the plurality of frame protrusions includes: a first frame protrusion having a first frame guide hole, into which the first screw is inserted; and a second frame protrusion having a second frame guide hole, into which the second screw is inserted. ### Claim 6 (depends on 5) The scroll compressor according to claim 5, wherein the first screw passes through the first coupling guide hole and is screw-coupled to the first frame guide hole, and wherein the second screw passes through the second coupling guide hole and is screw-coupled to the second frame guide hole. ### Claim 7 (depends on 1) The scroll compressor according to claim 1, further including a guide pin that surrounds a lower portion of the screw, wherein the guide pin passes through the guide hole of the scroll and is supported by an upper portion of the main frame. ### Claim 8 (depends on 1) The scroll compressor according to claim 1, wherein the reference pin passes through the first reference pin coupling hole and is inserted into the second reference pin coupling hole of the main frame. ### Claim 9 (depends on 1) The scroll compressor according to claim 1, further including a cover that partitions an inner space of the casing into a suction space and a discharge space. ### Claim 10 (depends on 9) The scroll compressor according to claim 9, wherein the casing includes a suction port that communicates with the suction space and a discharge port that communicates with a discharge space. ### Claim 11 (depends on 10) The scroll compressor according to claim 10, wherein the fixed scroll includes a discharge hole provided in approximately a central portion of the head plate through which a refrigerant compressed in the plurality of compression chambers is discharged into the discharge space. ### Claim 12 (depends on 10) The scroll compressor according to claim 10, wherein the fixed scroll includes a suction hole through which the refrigerant to be compressed in the plurality of compression chambers is introduced into the plurality of compression chambers from the suction space. ### Claim 13 (depends on 12) The scroll compressor according to claim 12, wherein the suction hole is provided in a side surface of the fixed scroll. ### Claim 14 A method for assembling a scroll compressor, the method comprising: supporting an orbiting scroll on a main frame; disposing a fixed scroll on the main frame to define a plurality of compression chambers together with the orbiting scroll; inserting at least one reference pin into the main frame and the fixed scroll; coupling a plurality of screws to the main frame and the fixed scroll; and separating the at least one reference pin from the main frame and the fixed scroll in a state in which the plurality of screws is coupled, wherein the fixed scroll includes: a head plate including a wrap and an outer peripheral surface; and at least one scroll protrusion that protrudes outward in a radial direction from the outer peripheral surface of the head plate, wherein the at least one scroll protrusion includes both a first reference pin coupling hole, into which the reference pin is inserted, and a guide hole, into which a screw of the plurality of screws is inserted, wherein the reference pin is removed from the first reference pin coupling hole after the fixed scroll and the main frame are assembled, wherein the main frame includes a main body and at least one frame protrusion that protrudes outward in a radial direction from an outer peripheral surface of the main body, and wherein the at least one frame protrusion includes a second reference pin coupling hole, into which the reference pin is inserted, and a frame guide hole, into which the screw of the plurality of screws is inserted. ### Claim 15 (depends on 14) The method according to claim 14, wherein the at least one scroll protrusion includes a plurality of scroll protrusions, wherein the at least one frame protrusion includes a plurality of frame protrusions, and wherein the disposing the fixed scroll on the main frame includes aligning the plurality of frame protrusions formed on the main frame with the plurality of scroll protrusions formed on the fixed scroll. ### Claim 16 (depends on 14) The method according to claim 14, wherein the coupling of the plurality of screws to the main frame and the fixed scroll includes inserting the plurality of screws into the frame guide hole in a state in which the reference pin is coupled to the at least one first reference pin coupling hole. ### Claim 17 (depends on 16) The method according to claim 16, wherein the coupling of the plurality of screws to the main frame and the fixed scroll includes inserting the plurality of screws into the plurality of frame guide holes in a state in which the reference pin is coupled to the second reference pin coupling hole. ### Claim 18 (depends on 14) The method according to claim 14, wherein the inserting the at least one reference pin into the main frame and the fixed scroll includes inserting a plurality of reference pins into the main frame and the fixed scroll.